Merv Keenihan attended Norwood Primary and Norwood High Schools. He progressed through the Norwood Football Club junior grades, and in 1953 was named the Junior Colts most effective player.
Keenihan was then adjudged the Reserves best junior in 1955, and the best team man in 1956. He made his senior debut in 1956 and played predominantly as a wingman.
In 1958 he was selected to represent South Australia in the Australian National Football Carnival in Melbourne. He had to withdraw however, because of injury. Later that year he was a member of the Norwood side that won the 1958 Advertiser Cup (night series).
In 1959 he was transferred to the country, but returned to play for the Reserves in the finals.
1960 saw him play in a Reserves premiership. Named on a wing, he was among Norwood's best players in its defeat of Port Adelaide.
He was awarded a player's Five Year Certificate after the 1960 season.
Keenihan also played a few A grade games for the East Torrens Cricket Club.
R Cialini Nov 2014